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Microgravity Science and Technology

, Volume 30, Issue 4, pp 525–534 | Cite as

Bubble Dynamics in Turbulent Duct Flows: Lattice-Boltzmann Simulations and Drop Tower Experiments

  • Pau Bitlloch
  • Xavier Ruiz
  • Laureano Ramírez-Piscina
  • Jaume Casademunt
Original Article
  • 54 Downloads

Abstract

Lattice-Boltzmann simulations of a turbulent duct flow have been carried out to obtain trajectories of passive tracers in the conditions of a series of microgravity experiments of turbulent bubble suspensions. The statistics of these passive tracers are compared to the corresponding measurements for single-bubble and bubble-pair statistics obtained from particle tracking techniques after the high-speed camera recordings from drop-towers experiments. In the conditions of the present experiments, comparisons indicate that experimental results on bubble velocity fluctuations are not consistent with simulations of passive tracers, which points in the direction of an active role of bubbles. The present analysis illustrates the utility of a recently introduced experimental setup to generate controlled turbulent bubble suspensions in microgravity.

Keywords

Turbulent flow Bubble dispersion Bubble interactions Microgravity Drop tower Lattice-Boltzmann simulations 

Notes

Acknowledgements

We acknowledge the support from ESA for the funding of the drop tower experiments that provided the raw data analyzed and the ZARM crew, in particular to Dieter Bischoff, for their valuable support all along the experiments and their hospitality. We acknowledge financial support from Ministerio de Economía y Competividad (Spain) under projects FIS2013-41144-P, FIS2016-78507-C2-2-P (J.C.), FIS2015-66503-C3-2-P (L.R.-P., also financed by FEDER, European Union), ESP2014-53603-P (X.R.), and Generalitat de Catalunya under projects 2014-SGR-878 (J.C.), 2014-SGR-365 (X.R.). P.B. acknowledges Ministerio de Ciencia y Tecnología (Spain) for a pre-doctoral fellowship. We also acknowledge the computing resources, technical expertise and assistance provided by the Barcelona Supercomputing Center, which were financed by RES (Red Española de Supercomputación, Spain) under projects FI-2010-2-0015, FI-2009-3-0007.

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Departament de Física de la Matèria CondensadaUniversitat de BarcelonaBarcelonaSpain
  2. 2.Departament de Química, Física i InorgànicaUniversitat Rovira i VirgiliTarragonaSpain
  3. 3.Departament de FísicaUniversitat Politècnica de CatalunyaBarcelonaSpain
  4. 4.Institut d’Estudis Espacials de CatalunyaBarcelonaSpain

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